以铝包镍(KF-6)和TiB_2为熔覆材料,利用激光熔覆技术在铜合金(Cr-Zr-Cu)表面制备出了以KF-6为过渡层,以TiB_2增强镍基复合涂层为强化层的梯度涂层。研究结果表明,熔覆粉末中TiB_2含量不同,其在强化层中的组织形态存在明显差异;强化层的平均硬度介于1150~1450HV之间;当TiB_2质量分数为10%时,梯度涂层具有最小的磨损率;当TiB_2质量分数为30%时,梯度涂层具有较为平稳的摩擦系数(约为0.4);处于基体和强化层之间的过渡层,能有效减弱强化层与基体之间成份和硬度的突变,使梯度涂层的成分及硬度平滑过渡。 Using KF-6 and TiB_2 as cladding materials, laser cladding technology was used to prepare KF-6 as the transition layer and TiB_2-reinforced Ni-based composite coating on the surface of Cr-Zr- The layer is a gradient coating of the reinforcing layer. The results show that the content of TiB 2 in the cladding powder is different, and the microstructure of the coating is obviously different. The average hardness of the strengthening layer is between 1150 and 1450 HV. When the content of TiB 2 is 10% The minimum wear rate of the graded coating was observed when the mass fraction of TiB 2 was 30%. The graded coating had a relatively stable friction coefficient (about 0.4). The transition layer between the substrate and the strengthening layer could effectively reduce the composition of the strengthening layer and the substrate And the abrupt change of hardness, make the gradient coating composition and hardness smooth transition.